#!/bin/sh
# @@@ START COPYRIGHT @@@
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#
# @@@ END COPYRIGHT @@@

if [ $# -ne 1 ]; then
	echo "Usage: `basename $0 .sh` <process-id>" 1>&2
	exit 1
fi

if [ ! -r /proc/$1 ]; then
	echo "Process $1 not found." 1>&2
	exit 1
fi

bt="bt"
if [ -d /proc/$1/task ]; then
	if [ `ls /proc/$1/task | wc -l` -gt 1 2>/dev/null ]; then
		bt="thread apply all bt"
	fi
fi

gdb --quiet -nx /proc/$1/exe $1 <<EOF 2>&1 |
set width 0
set height 0
set pagination no
$bt
EOF
egrep '(^#|^Thread)'

